A new development in the mystery of a purported city beneath Egypt's Giza pyramids could, if proven true, fundamentally reshape our understanding of human history. Italian researchers told DailyMail.com that not only are the shafts and chambers they found deep below the Khafre pyramid 38,000 years old, but also the Giza complex. >>> Biondi explained that the pre-existing civilization in Egypt built the city first, then the shafts and then the pyramid on top, creating a 'megastructure.' The salt encrustations inside the Great Pyramid, according to the team, were left behind from ocean water flowing into the structure. Colonel Howard...